Two-stroke-cycle internal-combustion engine.



W. M. APPLETON.

TWO-STROKE CYCLE INTERNAL COMBUSTION ENGINE.

APPLICATION FILED IAN-1311914.

1,151,434. Patented Aug. 24,1915.

2 SHEETS-SHEET l.

INVENTOR WITNESSES 5.2% W WMAppleT/m V ag W Attorney.

W. M. APPLETON.

TWO-STROKE CYCLE INTERNAL COMBUSTION ENGINE.

APPLICATION FILED JAN. 13. 1914.

1 1 5 1 A34. Patented Aug. 24, 1915.

2 SHEETSSHEET 2.

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WITNESSES INVENTOR 61W WMAppI/etm Ql gg M 7 M v Attorney.

PH (IO-,WASHINOTON n c WILLIAM MOR'IEN,APPLETON, 0F WESTON-SUPER-MARE,ENGLAND.

,, TWO-STROKE-CYGLE INTERNAL-COMBUSTION ENGINE.

Specificationof Letters Patent.

Application filed January 13, 1914. Serial No. 811,845.

To all whom it may concern Be it known that I, WILLIAM Mon'rnN Ar-PLETON, a subject of the King of Great Britain and Ireland, residing atTyn-y-Coed, Hill Road, Weston-super-Mare, in the county of Somerset,England, have invented certain new and useful Improvements inTwo-Stroke-Cycle Internal-Combustion Engines, of which the following isa specification.

This invention relates toimprovements in or modifications of thetwo-stroke cycle internal combustion engine patented on U. S. Patent No.100%70 dated 3rd October 1912, and it has for its objects facilitatingthe scavenging of the cylinder after the firing stroke, and removingcertain objectionable features involved in the constructions cov ered bysaid patent, the most important of which are the difi'icultyof producingsound castings for the piston constructed as de scribed in thespecifications of Letters Patent of the U. S. A. No. 1051537 dated 28thJanuary 1913', and the throttling of the charge due to the tortuousnature of the byports and the distributing passages. I attain the firstof these objects by using in conjunction with the piston a cylindricalextension adapted to operate as a sleeve valve to control the openingand closing both of the inlet and exhaust ports. This constructionenables the exhaust port to be located at the upper end of the workingcylinder and thereby enables a clear sweep through to be attained forscavenging purposes. The cylindrical extension is open at its upper endso that the firing takes place within same, and its upper end is guidedwithin a depending head within the cylinder as is usual in sleeve valveengines.

I attain the second object of this invention by locating the inlet porton the opposite side of the cylinder to the by-port and putting saidports into communication by means of an annular recess in the piston,and by forming two of the three distributing passages in a suitableenlargement of the casting of the cylinder and the third passage in acover adapted to be fixed over said enlargement whereby thecrossing-over of the passages in a single casing is avoided.

In the accompanying drawing which illustrates this invention, Figure 1is a view in sectional elevation through one of the cylinders, Fig. 2 isa view in side elevation showing the exhaust ports, the by-ports, andthe distribution ports on one side of the cylinders, and Fig. 3 is abroken view in side elevation showing the inlet'ports on the other sideof the cylinders.

Throughout the views similar parts are marked with like letters ofreference.

'According to the present invention, each of the power pistons a has acylindrical extension 8 adapted to operate as a valve for the exhaustports 7 of which there may be any suitable number. These ports arelocated at or near the upper end of the power cylinder a, and said upperend is fitted with a depending head it which with the inner wall of thecylinder forms an annular recess k in which the sleeve 8 works. upperend of the sleeve are ports 8 and in the lower end of the sleeve is aport 8 the former of which coincide with the exhaust ports f and thelatter of which coincides with the by-port y' when the piston a is atthe bottom of its stroke. I

The inlet port 6 which is located on the opposite side of the cylinderto the by-port j is placed in communication with said byport during apredetermined part of the cycle of the engine by means of an annularrecess a in the power piston a Two of the distributing passages 1' and rconnecting two of the by-ports j with two of the distribution ports Zare formed in'an enlargement t of the cylinder a, and the thirddistributing passage r for connecting the other by-port j with the otherdistribution port Z is formed in a cover r adapted to be fixed over theenlargement t.

The other parts of the engine to which no specific reference has beenmade present no novel features over the construction described andillustrated in the specification of U. S. A. Letters Patent No. 1051537dated 28th January 1913.

What I claim as my invention and desire to secure by Letters Patent isPatented Au 24:, 1915.

In the anion 1. In an internal combustion engine of g the two-cycletype, the combination of three pairs of cylinders, each pair beingarranged tandem fashion and one of each pair being a power cylinder andthe other a displacer cylinder, compound pistons working in saidcylinders, an inlet port in each power cylinder, a by-port in each powercylinder located on the opposite side of the cylinder to the inlet port,an annular recess in each power piston adapted to put the inlet andby-ports into communication during a predetermined part of the strokeofsaid piston,

exhaust ports located at or near the upper ends of the power cylinders,sleeve valves carried by the power pistons, said sleeve valvescontrolling the opening and closing of said by-ports and exhaust ports,a distribution port in each displacer cylinder, and three distributionpassages each connecting the by-port of the power cylinder of one pairand the distribution port of the displacer cylinder of one of the otherpairs.

'2. In an internal combustion engine of the two-cycle type, thecombination of three pairs of cylinders, each pair being arranged tandemfashion and one of each pair being,

series of ports one adapted to control the opening and closing of theexhaust ports and the otherto control the opening and closing of theby-ports, a distribution portin each displacer cylinder, and threedistribution assa es each connectin the b ort of b Y b 7 the powercylinder of one'pair and'the distribution port of the displacer cylinderof one of the other pairs.

3. In an internal combustion engine of the two-cycle type, thecombination of three pairs of cylinders, each pair being arranged tandemfashion and one of each pair being a power cylinder and the other adisplacer cylinder, compound pistons working in said cylinders, an inletport in each powercylinder, a by-port in each power cylinder located onthe opposite side of the cylinder to the inlet port, an annular recessin each power piston adapted to put the inlet and by-ports intocommunication duringa predetermined part of the stroke of said piston,exhaust ports located at or near the upper ends of the power cylinders,sleeve valvescarried by the power pistons, said valves having two seriesof ports one adapted to control the opening and the closing of theexhaust ports and other to control the opening and closing of the by-po-rts, an enlargement on said cylinders, two distributing passagesformed in said enlargement on the cylinders, a thirdpassage inacover'adapted to fit over and inclose the distributing pas.- sages insaid enlargement, a distribution port in each dis-placer cylinder, eachof said passages connecting the by-port of the power cylinder of onepair with the distribution port of the displacer cylinder of one of theother pairs. I

In testimony whereof I have signed my name in the presence of twowitnesses.

' WILLIAM MORTEN APPLETON.

Witnesses:

E. TYLER,

E. J. FUssELL.

Copies or this patent may be obtained for five cents each, by.addressing the Commissioner of Patents,

7 Washington, D. 0.

